Valve



B. F. DOWD Sept. 5 1933.

VALVE Filed Jan. 7, 1932 IVENTOR. .Bezyamm F1290 we],

A TTORNEY.

Patented Sept. 1933 v, U IT D STATES PATENT OFFICE Application January7, 1932. Serial 585,265

-6 Claims. (01. 277-43) This invention is a valve provided with abytively communicate with the casing space-at oppass; and has for itsobject to embody the valve posite sides of the medial partition, withthe valve and by-pass in a unitary structure having means 4 adapted toopen by pressure of a flow supplied for closing the by-pass anddirecting flow past the at inlet port 5 so as to permit discharge atoutlet valve for regulating the flow at the valve, or port 6, andadapted to be closed against the pres opening the by-pass andshutting-off flow to the surefor shutting-off the flow. valve so thatthe flow may continue through the The valve 4 may be actuated in anysuitable by-pass While the valve is inoperative. manner; and in theillustrated embodiment of The combined valve and by-pass is of generalthe invention showing the valve employed as a utility but isparticularly applicable to a confeed water regulator for a boiler,'it isactuated by struction wherein the .valve is automatically concontrolmechanism which is movable in accordtrolled, so that with the by-passclosed the valve ance with the water level in the boiler. The conisadapted to automatically regulate the flow; trol mechanism may be of thetype described and and with the flow to the valve shut-off, thebyclaimed in my U. S. Patent No. 1,826,058, of 00- i pass provides formanually regulating and contober 6, 1931, in which case it comprises avalve tinuing the flow while permitting removal and stem 7 adapted toabut against valve 4 and slidreplacement of the valve and its automaticconable in a sleeve 8 which may be'detachably control. nected to anipple 9 projecting from one side of As an instance of use of the valveit may be valve casing 1 at the axis thereof, with the valve;

embodied ina feed water regulator for a boiler, stem '7 reciprocated insleeve 8in accordance with. 5 with the valve actuated by any usualcontrol variations in the water level in a boiler (not mechanism movablein accordance with the washown), so that projection of the valve steminto ter level in the boiler and contained in a suitable casing 1 closesvalve 4 against the pressure of the housing which projects from thevalve casing, flow, while retraction of the valve stem permits;

and the valve casing having an inlet for feed wa-' the valve to openresponsive to the pressure of the ter and an outlet leading to theboiler, whereby flow. The means for reciprocating valve stem 7 the valvenormally automatically regulates the comprises a tube 10 projecting fromsleeve 8 and feed water supply to the boiler in accordance withsurrounding the valve stem,'with the tube termithe water level therein,or by shutting-01f the nating in a coupling 11 to which stem 7 is adflowto the valve and opening the by-pass the justably fixed as shown at 12.Conduits 1 314 feed water may be manually regulated while peropen intosleeve 8 and communicate respectively mitting removal of the valve andits control with the water space and the steam dome of the mechanism forrepair or replacement. 1 boiler; and the tube 10 and valve stem 7 are ofFurther objects of the invention will be readil ,materials such assuitable metals having appre- 2 understood from the followingdescription of the ciably different coefiicients of expansion, so thataccompanying g, in whichf longitudinal expansion and contraction 'of theFig. 1 is a side elevation of a feed waterre'gtitube, which has arelatively high coefiicient of lator for a boiler, with the improvedvalve adaptexpansion, reciprocates the valve stem which has ed toregulate the feed water supply and operaa substantially negligiblecoefiicient of expansion. r

tively assembled with relation to control mecha- The inlet and outletports 56 of the valve casnism which is actuated in accordance with theing are connected respectively to pipes '15.16, water level in theboiler. with the pipe 15 communicating with a source of Fig. 2 is afront elevation of the valve. feed water supply and the pipe 16 leadingto-the Fig. 3 is a vertical section on the line 3-3 of boiler; and thetube 10 of the automatic control 1 45 I v 'proj ects substantiallyhorizontally from valve cas- Fig. .4 is a vertical section on the line44 of ing 1 at approximately the normal water level in Y 9 the boiler..The. tube 10 thus contains either steam The improved valve comprises apreferably or water depending upon'the fall or rise of the I cylindricalcasing 1 having a medial transverse water. level in the boiler; and whenit'contains 0 partition 2 supporting a valve seat 3 at the axis of steamthe tube 10 expands so as toretract valve the casing. -A valve 4cooperates with the valve stem 7-for opening valve 4 to supply feedwater to seat for regulating flow from one side to the other the boileruntil the normal level is again reached. of the medial partition, anddiametrically oppo- The steamin tube 10 is thus replaced by water, sosite ports5-6 open through the peripheral wall that tube 10 contractsand thereby projects valve 1 of the Casing and as hereinafter describedrespecstem 7 for closing valve 4 so as to shut-on. the feed water supplyuntil the water level in the boiler is again lowered.

Referring now to the construction of valve casing 1, the ports -6 arearranged for communication with opposite sides of medial partition 2 byrecessing the medial partition adjacent the respective ports as shown at17 and 18, with walls 19-20 extending from the margins of the respectiverecesses to opposite end walls of the casing as shown in Fig. 3, so thatport 5 communicates with the casing space in back of the medialpartition while port 6 communicates with the casing space in front ofthe medial partition, and valve 4 controls the flow from one side to theother of the partition.

The casin 1 is also arranged so as to form a bypass around valve 4, withthe by-pass having a manual control whereby in lieu of the automaticcontrol at valve 4 the flow may be manually regulated via the by-pass;and when the by-pass is in use the flow to valve 4 may be completelyshut-oh so that sleeve 3 and valve may be removed for inspection andreplacement while continuing the flow through the by-pass.

For'this purpose the space in back of partition 2 is divided into twoseparate compartments by a wall 21-22-23, and the space in front ofpartition 2 is similarly divided into two separate compartments by awall 24-25-26. As shown in Fig. 4, the walls 22-25 comprise oppositelydisposed semi-circular structures each surrounding one-half of the valveseat 3 and together defining a complete circle, with walls 2-3-23 insuperimposed alinement and projecting laterally to the outer peripheryof easing 1- at one side of the circle, and walls 21-24 projecting inopposite directions from the opposite side of the circle and extendinglongitudinally to the outer periphery of easing 1.

The space in back of partition 2 thus communicat'es at 2'? with theinlet 5, but is shut-oil from valve seat3 by the wall 22, and extendsaround opposite sides of the casing with its end 28 shut-off by the wall21 and its opposite end 29 shut-off by wall 23.

The remainder of the space in back of partition 2 and shown at 30, isthus shut off from the space 27-28-29, but is open to valve seat 3. Insimilar manner the space in front of partition 2 comniunicates at 31with outlet 6, and is shut-off from valve seat 3 by wall but extendsaround opposite sides of the casing with its end 32 shut-ofi by wall 24and overlying space and its opposite end 33 shut-off by wall 26 andoverlying space 30. The remainder of the space in front of partition 2and shown at 34, is thus shut-off from the space 31-32 but is opentovalve seat 3 andoverlies the space -29.-

Valve seats 35, 36 and 37'are formed in partition 2, and respectivelyprovide communication betweenthe spaces 23-32, -33 and 29-34; and

valves 33, 39 and 40 cooperate with these respective valve seats. Thevalves are operatedby valve stems ii which project through usual bonnets42 on the valve casing 1, and the valves are respectively operated byusual manual controls 43, 4.4and 45.

- It will thus be seen that the valve 4 regulates flow from the space 34to the space 30; and when the .valve 4 is thus employed for regulatingthe flow, the-valves 39 and Y40 are opened and the valve '38 is closed,so that the flow is from inlet 5 via space '27-'29, past open valve 40to space 34;from whence its flow to space 30 is regulated by valve '4,with the flow discharging from space 30 past the inlet 6.

open valve 39 and thence via space 33-31 to the When for the purpose ofinspection, repair or At the same time the flow from space 27replacement it is desirable to removevalve 4', the

flow may be shut-off from valve seat 3 by closing the valves 39 and 40,it being understood that the valve 38 remains closed, if it is desiredto shut-off the flow through the entire system. By thus closing valves39 and 40 the incoming flow through space 21-29 is shut-oi? from thespace 34 which communicates with valve seat 3, and in similar manner byclosing the valve 39 the flow which may'back up in the space 31-33 isprevented from entering the space 30 which communicates with theopposite side of the valve seat 3, c

If, however, when thus rendering the valve 4 inoperative, it is desiredto by-pass the floW around said valve, the valve 38 is opened when thevalves 39-40 are closed. With valves 39-40 thus shut-off, the valve38'may be adjusted Ior manually regulating the flow through the bypasswhich is formed around the inoperative valve 4. by-pass comprisescommunication via the open valve 38 from the space 28 to the space 32,it being noted that the space 28 is in communication with the space 27which receives the incoming flow, and that space 32 is in communicationwith the space 31 from whence the flow is discharged at outlet 6; ,Amanually regulated by-pass which is entirely separate from the mainvalve 4 is thus provided by opening the valve 38 and at the same timeclosing the valves 39 40,

while on the other hand the main valve 4 is ren-' dered operative andthe by-pass is shut-off by closing the valve 38 and opening the valvesAn extremely simple valve structure is provided- Whereby a valvularcontrol and a by-pass around the valvular control may be embodied'in aunitary valve casing, with the medial partition of the valve casing andthe walls at the opposite sides of the medial partition preferably allcast inte gral with the valve casing.

In practice the ports 5 and 6 may be provided with suitable identifyingmarks as shown at 50 so as to readily indicate the properoperativeasseinbly of the valve structure in a flow circulating system,it being noted that in the illustrated embodiment of the invention thevalve structure is assembled so that the'pressure of the incoming flowtends to open valve 4 and the valve is closed.

lating system wherein it is preferable to close valve 4 by the pressureof the flow, in which case a v a q 1. In combination, a valve casing, amed alpartition in the casing, ports in the casing communicatingrespectively with the spaces at opposite sides of the partition, a valveseat in the partition, a valve cooperating with the seat, a wall in eachof the spaces at opposite sides of the parpartition being closed to thevalve seat and open to that port which communicates with the space atthe corresponding side of the partition, a portion of each of the firstmentioned compartments o'verlying'a portion of the second men tionedcompartment which is at the opposite side of the partition, openings inthe partition providing communication between each pair of saidoverlying compartments, portions of the second mentioned compartments atopposite sides of the partition overlying one another, an opening in thepartition providing communication between said last mentioned overlyingportions of the second mentioned compartments, valves for the respec-'tive openings in the partition, and means for operating said lastmentioned valves from the exterior of the valve casing.

2. In combination, a valve casing, a medial partition in the casing,ports in the casing cominunicating respectively with the spaces atopposite sides of the partition, a valve seat in the partition, a valvecooperating with the seat, a wallin each of the spaces at opposite sidesof the partition dividing each of said spaces into two compartments, oneof the compartments at each of opposite sides of the partitioncommunicating with the valve seat and being closed to that port whichcommunicates with the space at the corresponding side of the partition,and the other of the compartments at each of opposite sides of thepartition being closed to the valve seat and open to that port which.communicates with the space at the corresponding side of the partition,each of the first mentioned compartments having a passagewaycommunicating with the second mentioned compartment which is at theopposite side of the partition, the second mentioned comeach of oppositesides of the'partition communieating with the valve seat and beingclosed to that port which communicates with the space at thecorresponding side of the partition, and the other of the compartmentsat each of opposite sides of the partitionbeing closed to thecompartments having a passageway communivalve seat and open to that portwhich communicateswith the space at the corresponding side of thepartition, each of the first mentioned eating with the second mentionedcompartment 'which is at the opposite side of the partition,

and valves for the respective passageways.

4'. In combination, a valve casing, a pair of ports in the casing, apartition in the casing, a valve seat in the partition, a valvecooperating with the seat, a wall in the space at one side of thepartition dividing said space into two compartments, one of saidcompartments communicating with the valve seat and being closed to oneof said pair of ports and having a pas vsageway leading to the other ofsaid pair of ports, the other of said compartments being closed to thevalve seat and open to the first mentioned port, the last mentionedcompartment having a passageway communicating with the space at theopposite side of the-partition, and a valve for said passageway.

5. In combination, a Valve casing, a medial partition in the casing,ports in the casing communicating respectively with the spaces'at oppo-0 site sides of the partition, a valve seat in the partition, a valvecooperating with the seat, a wall in each of the spaces at oppositesides of the partition dividing each of said spaces into twocompartments, one of the compartments at each of opposite sides of thepartition communieating with the valve seat and being closed to thatport which communicates with thespace at the corresponding side of thepartition, and the other of the compartments at each of opposite sidesof the partition being closed to the valve seat and open to that portwhich communicates with the space at the corresponding side of thepartition, each of the first mentioned compartments having a passagewaycommunieating with the second mentioned compartment which is at theopposite side of the partition, and a valve for one of said passageways.

6. In combination, a valve casing, a pair of ports in the casing, apartition in the casing, a 1

valve seat in the partition, a valve cooperating with the seat, a wallin the space at one side of the partition dividing said space into twocompartments, one of said compartments communicating with the valve seatand being closed to one of said pair of ports and having apassagewayleading to the other of said pair of ports, the other of saidcompartments being closed to the valve seat and open to the firstmentioned port, the last mentioned compartment having a passagewaycommunicating with the space at the opposite side of the partition,said'last mentioned compartment also having a passageway communicatingwith the second mentioned port, and 13 valves for the respectivepassageways.

BENJAMIN F. Down.

